view libervia/backend/memory/migration/env.py @ 4095:684ba556a617

core (memory/sqla_mapping): fix legacy pickled values: folloing packages refactoring, legacy pickled values could not be unpickled (due to use of old classes). This temporary workaround fix it, but the right thing to do will be to move from pickle to JSON at some point.
author Goffi <goffi@goffi.org>
date Mon, 12 Jun 2023 14:57:27 +0200 (20 months ago)
parents 4b842c1fb686
children 0d7bb4df2343
line wrap: on
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import asyncio
from logging.config import fileConfig
from sqlalchemy import pool
from sqlalchemy.ext.asyncio import create_async_engine
from alembic import context
from libervia.backend.memory import sqla_config
from libervia.backend.memory.sqla_mapping import Base

# this is the Alembic Config object, which provides
# access to the values within the .ini file in use.
config = context.config

# Interpret the config file for Python logging.
# This line sets up loggers basically.
fileConfig(config.config_file_name)

# add your model's MetaData object here
# for 'autogenerate' support
# from myapp import mymodel
# target_metadata = mymodel.Base.metadata
target_metadata = Base.metadata

# other values from the config, defined by the needs of env.py,
# can be acquired:
# my_important_option = config.get_main_option("my_important_option")
# ... etc.


def run_migrations_offline():
    """Run migrations in 'offline' mode.

    This configures the context with just a URL
    and not an Engine, though an Engine is acceptable
    here as well.  By skipping the Engine creation
    we don't even need a DBAPI to be available.

    Calls to context.execute() here emit the given string to the
    script output.

    """
    db_config = sqla_config.get_db_config()
    context.configure(
        url=db_config["url"],
        target_metadata=target_metadata,
        literal_binds=True,
        dialect_opts={"paramstyle": "named"},
    )

    with context.begin_transaction():
        context.run_migrations()


def include_name(name, type_, parent_names):
    if type_ == "table":
        if name.startswith("pubsub_items_fts"):
            return False
    return True


def do_run_migrations(connection):
    context.configure(
        connection=connection,
        target_metadata=target_metadata,
        render_as_batch=True,
        include_name=include_name
    )

    with context.begin_transaction():
        context.run_migrations()


async def run_migrations_online():
    """Run migrations in 'online' mode.

    In this scenario we need to create an Engine
    and associate a connection with the context.

    """
    db_config = sqla_config.get_db_config()
    engine = create_async_engine(
        db_config["url"],
        poolclass=pool.NullPool,
        future=True,
    )

    async with engine.connect() as connection:
        await connection.run_sync(do_run_migrations)


if context.is_offline_mode():
    run_migrations_offline()
else:
    asyncio.run(run_migrations_online())